Waterproof Pulse Wireless polar heart rate monitor watch Digital cardio sensor Fitness sport Running hrm Heart Rate Chest Strap<br> <br> Features:<br> <br> Wireless receiving heartbeat signal transmitted from heartbeat brooch,chest band frequency is AM5.3KHz;<br> <br> Time display: hours, minute, second;<br> <br> Alarm clock function;<br> <br> Give alarm shen heart rate exceeds the upper and lower limit values (60-220);<br> <br> Timing (maximum time-keeping is 23 hours, 59 minutes, 59 seconds, 99);<br> <br> 12/24 hour display format;<br> <br> EL backlight;<br> <br> Keystoke tone<br> <br> Waterproof: 50m Waterproof (please not press watch button under water.)<br> <br> Package Inlcuded:<br> <br> 1 * Watch(Battery included)<br> <br> 1 * Chest Strap(Battery included)<br> <br> 1 * English Instruction